1 files changed, 19 insertions, 0 deletions
diff --git a/tests/reversed-range-endpoints b/tests/reversed-range-endpoints
new file mode 100755
index 0000000..faa33f4
--- /dev/null
+++ b/tests/reversed-range-endpoints
@@ -0,0 +1,19 @@
+#!/bin/sh
+# Ensure that an invalid range like [b-a] evokes exit status of 2.
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+
+printf 'Invalid range end\n' > exp
+for prog in grep 'grep -E'; do
+  $prog '[b-a]' < /dev/null > out 2>&1
+  # exit status must be 2, not 1
+  test $? = 2 || fail=1
+
+  # Remove "$prog: " prefix from actual output.
+  sed 's/^[grep]*: //' out > k && mv k out
+
+  compare exp out || fail=1
+done
+
+Exit $fail